Fleshlight Wonder Wave has got inside plenty of textured waves along the whole length. As a Wonder Wave user I can assure you that those waves will give you amazing sensations. This fleshlight masturbation sleeve provides a fantastic orgasms and the completely new experience. The canal diameter is 1/2 inch long. Rest of diameters are standarded to every fleshlight case. Remember, all fleshlight sleeves are sold without case. Wonder wave like every sleeve likes a bit of lube. Always use only water-based lubricants, other way you can destroy the SuperSkin material.